Refs #1579. First cut a swapping of config directories.

Due to the way Qt deals with the settings files, the swap must occur
on shutdown.
Refs #1579. Putting settings switch back.
Refs #1579. Handling Windows registry copying.
Refs #1579. Remove debugging.
Refs #1579. Make comments commensurate with new config location.
Refs #1579. Adding documentation for function.
Merge remote branch 'origin/bugfix/7227_SCDCalib_L0'
Merge remote branch 'origin/feature/1579_rename_config_dir'
Refs #7255. Revamping layout for DimensionWidget.
Refs #7255. Tweaking ThresholdRangeWidget layout.
Refs #7255. Tweaking DimensionWidget min/max lineedits.
Refs #7255. Get BinWidget to stop jumping on checking Integrate.
Refs #7255. Putting back layout for ThresholdRangeWidget title.
Refs #7255. Tweaking size on dimension combobox.
Merge branch 'feature/7255_rebincutter_widgets' into develop